What's That Bug? does not endorse extermination

WHAT KIND OF BUGS ARE THESE??? THEY ARE BLACK WITH TWO RED STRIPES ON THE WINGS AND THEY LOOK LIKE A FIREFLY. WE WERE TOLD THAT THEY ARE A TYPE OF BEETLE, BUT ARE UNABLE TO FIND THEM IN ANY BOOK. THEY ARE COMING FROM A ROTTING ELM TREE. THERE IS ALSO WATER DAMAGE TO THE HOUSE IF THIS HELPS IDENTIFY THEM.

Dear Stat,
Without more concrete information regarding size and orientation of the stripes, vertical versus horizontal, it would be difficult to identify your bug. Wood boring beetles are often of the longhorn variety, and though they are not true beetles, the box elder bug (Leptocoris trivittatus) might be your culprit, but they eat leaves, not rotting wood. Rove beetles look like fireflies, but their wings are hidden. They might lurk around rotting wood, searching for soft succulent prey. Can you send a photo?

What's That Bug? does not endorse extermination

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